MESA 1 & 2
5MW / 13.4MWh (combined)

After growing its wind generation from 0-to-8% in just two years, Snohomish County (SnoPUD) realized it would not be able to keep adding wind generation to the system without help managing its intermittency. They turned to energy storage as the answer, both to address renewable intermittency and to more broadly support the transmission and distribution grid. SnoPUD recognized that to deploy more than one ESS cost-effectively, energy storage had to become more scalable and replicable. Economies of scale require standardized components and publicly available software interfaces to connect them together.

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​Doosan GridTech Solution

Doosan GridTech delivered a holistically designed, grid integrated and optimized, set of energy storage systems for SnoPUD. The set is comprised of three separate energy storage systems, fully designed, procured, installed, and commissioned by Doosan GridTech. Two ESSs were deployed at the same substation and demonstrated the Doosan GridTech Intelligent Controller® (DG-IC®) capability to manage more than one ESS at the substation. The third ESS is an energy-dense (2MW/8MWh) vanadium redox flow battery, with another DG-IC® control system. All ESSs were deployed using the MESA standards, ensuring that SnoPUD has standardized communication interfaces, uniform scheduling capability, and reliable security parameters.

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Doosan GridTech integrated its DG-IC® controls into SnoPUD’s communication and SCADA control systems, with scheduling functionality for optimal management. Effective and functional integration of ESS controls into SCADA, and other control systems are one of the most important factors of ESS scalability and is why more and more utilities require compliance with MESA standards.